Marine Debris Collector Green A: Sketch Model Review

2 The Debris Collecting Vessel Pontoon boat $525 Capacity 400 lbs Length 9 ft, width 5 ft Floats in 3” water Trolling motor $300 Electric (no fuel spills) Speed 1-2 mph Most Critical Module: Mechanism for picking debris up out of the water

3 Mechanism Idea: Paddle Wheel Concept Frame with screens rotates Power calculations show possible to power by human Testing Screens create large drag force Debris may cling to screens

4 Mechanism Idea: Rake Wheel Concept Similar to paddle wheel, but collection bin has raked front, allowing debris to be removed from wheel Testing Successfully captured trash Further issue Still possible to have clogging issues with seaweed

5 Mechanism Idea: Momentum Concept Incline plane uses momentum to move water and debris into netted holding area Force of friction must be less than inertial force, if dry motion Testing Large force on the inclined plane Force varies with shape of wedge

6 Mechanism Idea: Rollers Concept Angled rollers rotate bottles, not seaweed, into bins Uses water drag to push trash against rollers Testing Bottles stay on top of rollers Further issues Need third roller to move debris into bins Spring joint to prevent jamming

7 The Problem Current Practice labor and time intensive use fishing nets ~20 bottles per outing 88% of floating debris collected in the Boston Harbor is smaller than a plastic bottle

8 Market and Customer Needs Coastal and marine waters generate $54 billion in goods and services support 28.3 million jobs polluted by 4,500 tons of coastal trash yearly Customer Needs manned one-person operation vessel collects more per outing than manual methods (100 pieces of debris per outing) ability to collect along coasts

9 Future Work Waves and water conditions Seaweed Marine life Vessel maintenance Larger scale